Discussion in 'OT Technology' started by tehexile, Sep 20, 2006.
how would i go about finding out which ports are blocked of use if i cant access the router?
Do you mean incoming or outgoing ports?
That's hard... You could run a portscan but you'll never know if it was the machine on the other end or the router that has a port closed.
replace XXXX with the port, hope this helps.
Did you know that there are 65536 ports? And if you only limit yourself to the well-known ports, you still end up with 1024 ports. Besides, the website you give tests for incoming ports... not outgoing.
so.. any other ideas?
Only way I can think of getting this done is by setting up some sort of a dummy server on every port (or as many ports as you can manage or are interested in) and then running a portscan.
Unless theres automated tools to do it (might be), its probably not worth the bother.
edit: what/how many ports do you wanna check for?
i just wanna check all the ports to see which ones are available for use, and which ones arent
What exactly are you trying to do? Pick a port and see what happens.
If you are behind a router, you're gonna need to forward the port anyway.
Do a google search for Angry IP Scanner. It's a free little tool that can scan every port on every IP address on your network, if you want it to. It came in really handy when I was trying to get a black-box NAS up and running, and I couldn't connect to it without knowing which ports were open.
Angry is good, also www.grc.com and use the Shields Up option and they'll let you know what's open and how vulnerable your system is.